Dorcas gazelles are highly adapted to the desert; they can go their entire lives without drinking, as they can get all of the moisture they need from the plants in their diets, though they do drink when water is available. They are able to withstand high temperatures, but when it is very hot, they are active mainly from dusk to dawn. In areas where they face human predation, they tend to be active only at night to minimise the risk of falling prey to hunters. These gazelles feed on leaves, flowers, and pods of many species of acacia trees, as well as the leaves, twigs and fruits of various bushes. They occasionally stand on their hind legs to browse from trees, and after rain, they have been observed digging out bulbs from the ground. Dorcas gazelles are able to run at speeds up to 80 km/h (50 mph)to 96 km/h (60 mph) when threatened, they tail-twitch and make bouncing leaps with their heads held high (stotting), possibly to announce they have seen a predator.